US1189915A - Independent fire-alarm. - Google Patents

Description

, A. A. CLIVE.

-INDEPENDENT FIRE ALARM.

APPLlCATION FILED NOV.2B| 1911. RENEWED MAY 17.1916.

, Patented July 4, 1916.

M L WEE em up STATES PATENT ormon.

ALBERT A. CLIVE, 015 LOS ANGELES, CALIFORNIA, ASSIGNOR TO AMERICAN FIRE ALARM COMPANY, OF LOS ANGELES, CALIFORNIA, A CORPORATION OF CALI- FORNIA.

INDEPENDENT FIRE-ALARM.

Specification of Lettel's Patent.

Application filed November 28, 1911, Serial No. 662,940. Renewed May 17, 1916. Serial No. 98,213.

To all whom it may concern Be it known that I, ALBERT A. CLIVE, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Independent Fire-Alarm, of which the following is a specification.

An object of this invention is to provide a simple, compact and inexpensive device which can be installed with great ease and convenience wherever desired throughout buildings for the purpose of automatically giving an alarm in case of fire.

In carrying out the invention spring driven or weight driven clock-work may be employed to operate the signal device but the spring driven clock-work is preferred. Various forms of construction may be employed.

The accompanying drawings illustrate the invention.

Figure 1 is a front View of the alarm as it appears when set; a portion of the gong being broken to expose parts that would otherwise be hidden. Fig. 2 is an elevation from the right of Fig. 1; the gong being broken. Fig. 3 is a fragmental sectional elevation on enlarged scale from line 12 Fig. 1, looking toward the right.

The frame may be of any suitable character, and as shown may include a plate 1 which may be of wood and the base plate 2, standards 3 and top plate 4: of the clockwork which may be constructed like an ordinary automatic door bell, the gong 5 of which is screwed onto the end of the post 6 to which the inner end of the spring 7 is fixed; the outer end of said spring being connected with the spur-wheel 8 that acts upon the pinion 9 of the escapement wheel 10 controlled by the escapement 11 that is fixed to the verge 12 which is pivotally mounted in the plates 2 and 1 and to which is rigidly fixed the bent stem 13 'of the hammer 14. The escapement is a rebounding escapement and the clock-work, the hammer and hammer stem are all inclosed inside the gong 5, and the clock-work through its escapement normally operates the signal device composed of the hammer to cause it to sound the alarm on the gong 5. A stop adapted to normally release the escapement and allow the signal to be given is provided and is held in escapement-stopping position by a fuse. In the form shown in the drawings, the stop consists of a pivoted bar 15 pivotally mounted on a horizontal pin 16 seated in the plate 1. A fuse support 17 is fixed to the plate 1 and projects into position below the free end of the escapement stop formed by the pivoted bar 15, and is provided on its upper side with a socket 18- to form a fuse seat directly below a socket 19 that forms a fuse seat in the free end of the pivoted escapement stop bar 15. The fuse 20 consists of a short piece of wire composed of some readily fusible metal or other suitable material the melting point of which is within the temperature range of the hot gases depended upon for operation of ,the alarm; as, for instance, a temperature of say 125 Fahrenheit. The plate 1 may be per forated as at 21 or otherwise provided with supporting means, and may be fastened by a screw, nail or pin near the ceiling at a selected place whereby hot gases from an incipient fire would first collect. 7

To set the alarm, the escapement stop 15, which is movable toward and from the hammer in the way of the hammer, will be brought upagainst the hammer stem 13 to prevent the operation of the clock-work and the fuse wire 20 will be inserted into the sockets 18 and 19 and then the alarm thus set will be hung or otherwise mounted where the hot gases will reach the fuse. In case of fire the hot gases that reach the alarm station will melt the fuse, thereby allowing the alarm bar or escapement stop 15 to be thrown out of the way by the force of the escapement and thereupon the alarm is set in operation. By preference the parts are arranged, as shown inthe drawings so that the escapement stop is adapted to normally be actuated by gravity to release the escapement; such release in the instance shown being effected by the force of gravity as soon as the fuse is melted.

The fuse 20 preferably consists of a single-limbed element which as shown in the drawings is under compression by weight of the stop-15 and expansive force of the spring 7, such compression tending to bend the fuse when the fuse is subjected to the action of the heated ases before complete melting of the fuse tafikes place, thus minimizing the heat necessary to effect operation of the alarm and in efiect producing a fuse of maximum sensitiveness to heat.

I claim 1. The combination with a frame; of clock work carried by the frame; a signal device operated by the clock work; a horizontal pivot pin; a bar pivoted at one end on the pin and adapted at its free portion to form a stop for the clock work and also to normally fall by gravity out of stopping position; a fuse support; and a fuse to hold the bar in clock-work stopping position.

2. The combination with a frame; of

. clock work carried by the frame; a signal device operated by the clock work; a horizontal pivot pin; a bar pivoted at one end on the pin and provided with a socket at its free portion and adapted at its free portion to form. a stop for the clock work and also to normally fall by gravity out of stopping position; a fuse support provided with a socket; and a fuse wire in the socket to hold the bar in clock-work stopping position.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 22d day of November, 1911.

JAMES R. TOWNSEND, L. BELLE R1011.

Copies of this patent may be obtained for five cents each, by addressing the Commhnoner '0! Yatents Washington, D. 0."

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